File-drop content is visible through the gallery app (NC-SA-2019-012)
22nd October 2019
Risk level: Low
CVSS v3 Base Score: 5 (AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N)
HackerOne report: 719426
Improper authorization in Nextcloud server 17.0.0 causes leaking of previews and files when a file-drop share link is opened via the gallery app.
- Nextcloud Server < 17.0.1 (CVE-2020-8119)
- Nextcloud Server < 16.0.6 (CVE-2020-8119)
- Nextcloud Server < 15.0.13 (CVE-2020-8119)
The error has been fixed.
It is recommended that the Nextcloud server is upgraded to 17.0.1.
The Nextcloud team thanks the following people for their research and responsible disclosure of the above advisory:
- Olav Seyfarth (nursoda) - Vulnerability discovery and disclosure.
This advisory is licensed CC BY-SA 4.0.